Homogenous Per-Share Merger-Damages Settlements May Proceed Under Rule 23(b)(1)/(b)(2) Without Mandatory Opt-Out; Celera Opt-Out Remains an Exceptional, Discretionary Remedy

Case: IsZo Capital LP v. Stephen Brandenburg (Del. Supr. Sept. 14, 2026)
Court: Supreme Court of Delaware
Posture: Appeal by objector (IsZo Capital LP) from Court of Chancery order approving a $32 million settlement in consolidated merger litigation without granting an opt-out right.

1. Introduction

This decision arises from stockholder litigation challenging the fairness of Novo Nordisk A/S’s acquisition of Emisphere Technologies, Inc. The central economic allegation was classic Delaware merger litigation: the merger price allegedly was unfair, and Emisphere’s controlling stockholder, MHR, allegedly extracted a unique side benefit through its influence over the Emisphere Board.

The key procedural issue was not the merits of price or process, but whether a stockholder objector—IsZo Capital LP, Emisphere’s largest unaffiliated stockholder—was entitled to opt out of a non-opt-out class certified under Court of Chancery Rule 23(b)(1) and (b)(2), so it could pursue individual damages claims after the class settlement released those claims. IsZo urged the Supreme Court to “revisit” and effectively “revitalize” the discretionary opt-out concept recognized in In re Celera S'holder Litig.

2. Summary of the Opinion

3. Analysis

A. Precedents Cited

1) In re Celera S'holder Litig.

Celera is the opinion’s doctrinal anchor. It supplies two key propositions:

• Discretionary opt-outs are permitted even in Rule 23(b)(2) classes (which ordinarily are non-opt-out), but only after a balance of equities weighing added protections against the costs and risks to unitary adjudication/settlement.
• Due process concerns can require an opt-out when representation is inadequate or when an objector has sufficiently distinct claims such that opting out would facilitate fair and efficient litigation.

The Supreme Court emphasized Celera’s “somewhat unique” circumstances: the class representative was found “barely adequate,” and the objector sought to pursue “a clearly identified and supportable claim for substantial money damages” that class counsel had not uncovered pre-settlement. By contrast, the Court accepted Chancery’s findings that the plaintiffs here “vigorously pursued” the case, provided a reasoned strategy, obtained substantial recovery, and that IsZo identified no documentary evidence showing omitted viable theories.

2) Wal-Mart Stores, Inc. v. Dukes

IsZo relied on Wal-Mart Stores, Inc. v. Dukes to argue that non-opt-out certification is constitutionally suspect where monetary relief is released. The Supreme Court narrowed Wal-Mart to its context: a massive employment discrimination class where backpay required individualized determinations and individualized defenses—features incompatible with (b)(2).

The Delaware Court distinguished merger-price fiduciary-duty damages as transaction-wide and per-share uniform: one deal, one price, one alleged shortfall measured the same way on every share. In that setting, the Court reasoned that Wal-Mart does not dictate an opt-out right.

3) Due process and standard of review cases

• Hercules Inc. v. Leu Trust and Banking (Bahamas) Ltd. was cited for de novo review of due-process implications in class certification.
• Nottingham Partners v. Dana (quoting Matthews v. Eldridge) supplied the due-process benchmark: a meaningful opportunity to be heard at a meaningful time and in a meaningful manner.

4) Court of Chancery practice post-Celera

The Supreme Court also cited decisions illustrating Chancery’s continued use of non-opt-out certification in fiduciary-duty merger litigation and its treatment of opt-outs as extraordinary:

• In re Straight Path Commc'ns, Inc. S'holder Litig.
• In re Del Monte Foods Co. S'holder Litig.
• In re MPM Holdings Inc. Appraisal & S'holder Litig.
• In re Calamos Asset Mgmt., Inc. S'holder Litig.

5) IsZo’s supporting authority outside Delaware class doctrine

IsZo cited N. Sound Cap. LLC v. Merck & Co., Inc. for the proposition that opt-out capability underpins constitutional scrutiny where damages are at stake. The Delaware Supreme Court did not adopt that framing, instead holding that the Celera framework—faithfully applied—provides constitutionally sufficient process for homogenous per-share claims.

B. Legal Reasoning

1) The Court refused to convert discretionary opt-out into a categorical right

IsZo asked the Court to create a settlement-stage rule: if there is no equitable class-wide relief and a settlement releases monetary-damages claims, then (b)(1)/(b)(2) certification should be deemed inappropriate or an opt-out should be required. The Court rejected this as inconsistent with Delaware’s existing Rule 23 regime and with the narrower holding of Wal-Mart Stores, Inc. v. Dukes.

2) Homogeneity of per-share damages is constitutionally and administratively significant

The Court’s central doctrinal move is its emphasis on homogeneity: a single transaction at a single price yields uniform per-share damages and no need for individualized entitlement determinations. That homogeneity both:

• distinguishes the case from individualized monetary claims (like backpay), and
• supports the legitimacy of resolving the matter through unitary class settlement without mandatory opt-outs.

3) Due process was satisfied through robust participation rights, not opt-out rights

The Court framed due process as process-to-be-heard, not an automatic right to exit. It stressed that IsZo received the discovery record, briefed and argued its objection, and obtained a merits determination. That, the Court held, satisfied the Nottingham Partners v. Dana/Matthews v. Eldridge standard.

4) No abuse of discretion under Celera

Applying abuse-of-discretion review, the Court accepted Chancery’s factual findings that:

• class counsel litigated vigorously and achieved a substantial recovery,
• IsZo failed to identify concrete evidentiary support for its claim that valuable theories were ignored,
• the “billions left on the table” argument was speculative and inconsistent with the record’s valuation evidence, and
• an opt-out could risk the settlement recovery for the class.

Because Celera turns on a balance of equities and exceptional facts, the absence of those exceptional facts here justified denial of an opt-out.

C. Impact

• Stabilizes Delaware’s merger-settlement class mechanism: The Court reinforced that Rule 23(b)(1)/(b)(2) remains viable for single-transaction, per-share fiduciary-duty claims, even when settlements release monetary damages.
• Confines Celera to exceptional circumstances: The opinion signals that opt-outs are not a routine “safety valve” for large or sophisticated holders dissatisfied with deal-litigation settlements; they remain extraordinary and fact-dependent.
• Limits Wal-Mart spillover into Delaware merger litigation: Parties should not expect federal (b)(2) limits on individualized monetary relief to mandate opt-outs where damages are uniform per share and do not require individualized adjudications.
• Guidance for objectors: Successful opt-out requests will likely require a concrete showing of inadequacy of representation or a distinct, supportable claim that class counsel did not pursue—more than generalized dissatisfaction with settlement size.

4. Complex Concepts Simplified

• Rule 23(b)(1) class: Used when separate suits risk inconsistent rulings or would practically impair others’ interests. These classes typically do not provide opt-out rights because uniform resolution is the point.
• Rule 23(b)(2) class: Traditionally aimed at injunctive/declaratory relief applying to the class as a whole; Delaware recognizes a discretionary opt-out in rare cases.
• Rule 23(b)(3) class: The “opt-out” damages class (predominance/superiority). IsZo sought to push Delaware toward (b)(3) or mandatory opt-outs in settlement-only monetary contexts; the Court declined.
• “Homogenous” per-share damages: A damages model where every share is harmed the same way (same alleged price shortfall) so recovery is a uniform per-share amount, not an individualized award.
• Discretionary opt-out (the Celera concept): Not a right; a remedy a court may grant when due process/adequacy concerns or distinct claims outweigh the benefits of a unitary settlement.
• Abuse of discretion review: The appellate court defers to the trial court’s balancing and fact findings unless the decision exceeds the bounds of reason.

5. Conclusion

The Delaware Supreme Court’s affirmance in IsZo Capital LP v. Stephen Brandenburg solidifies a pragmatic rule for merger fiduciary-duty litigation: where claims concern a single transaction at a single price and damages are uniform per share, settlement and release can proceed under Rule 23(b)(1)/(b)(2) without a mandatory opt-out, so long as the court applies the In re Celera S'holder Litig. balancing framework and provides meaningful process for objections.

The decision’s broader significance is its clear boundary-setting: Celera remains good law, but exceptional; Wal-Mart Stores, Inc. v. Dukes does not transform Delaware merger settlements into presumptive opt-out damages classes; and due process in this setting is satisfied primarily through robust objection procedures and adequacy-of-representation scrutiny rather than a categorical exit right.